What to expect when you mail a letter to West Valley Detention Center
Missing details or a sealed envelope can delay your mail. Here's how to address letters to West Valley Detention Center and what happens during inspection.
Use the facility's return address exactly as written on the front of your envelope: West Valley Detention Center, 9500 Etiwanda, Rancho Cucamonga, CA 91739.
- ✓ Inmate’s name
- ✓ Booking number
- ✓ Housing location
- ✓ The facility return address (written on the front of the envelope)
Note: Don’t seal the envelope. Outgoing and incoming mail is subject to being scanned, read, and inspected.
It's easy to seal an envelope out of habit - don't. West Valley Detention Center requires envelopes to stay open because all mail, incoming and outgoing, gets scanned, read, and inspected.
- Write the inmate’s details on the front - include the inmate’s name, booking number, and housing location so staff can route the letter correctly.
- Add the facility return address on the front - use: West Valley Detention Center, 9500 Etiwanda, Rancho Cucamonga, CA 91739.
- Leave the envelope unsealed - outgoing (and incoming) mail is subject to being scanned, read, and inspected, so sealing it can work against you.
After your letter clears inspection, mail goes out to housing units daily. Getting the envelope details right from the start helps avoid delays in that process.
Verify before you send: This guide doesn't cover prohibited items, envelope size limits, allowed enclosures, or turnaround times. If you're sending anything beyond a basic letter, call the facility to confirm current rules.
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